\begin{tabular}[t]{lc}
\toprule
  & \makecell[c]{\emph{Dependent Variable:}\\Share of Day Not-Reporting}\\
\midrule
Treatment (=1) & -0.166***\\
 & (0.035)\\
Predicted Abatement Cost & 0.000\\
 & \vphantom{1} (0.002)\\
Predicted Abatement Cost $\times$ Treatment & 0.000\\
 & (0.002)\\
\midrule
R$^2$ & 0.13\\
Observations & 304\\
\bottomrule
\end{tabular}